摘要：
饼图比XY图简单一点。基本上是一样的。没有X和Y坐标轴，就没有第二个坐标。这有点简单。
饼状图要比XYDiagram要简单一点，大体上也是那些东西，没有了X、Y坐标轴，也就没有了第二坐标，要简单一点。
PieChartControl.xaml
<UserControl x:Class="WpfControl.PieChartControl" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:dxc="http://schemas.devexpress.com/winfx/2008/xaml/charts" mc:Ignorable="d"> <Grid> <dxc:ChartControl x:Name="chart" MouseDown="chart_MouseDown" MouseMove="chart_MouseMove" MouseUp="chart_MouseUp"> <dxc:ChartControl.Titles> <dxc:Title x:Name="title" Content="Title" Dock="Top" HorizontalAlignment="Center" VerticalAlignment="Top"/> </dxc:ChartControl.Titles> <dxc:SimpleDiagram2D x:Name="diagram2D"> </dxc:SimpleDiagram2D> <dxc:ChartControl.Legend> <dxc:Legend HorizontalPosition="Right"/> </dxc:ChartControl.Legend> </dxc:ChartControl> </Grid> </UserControl>
PieChartControl.cs
using System; using System.Collections.Generic; using System.Windows; using System.Windows.Controls; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Animation; using DevExpress.Xpf.Charts; using Dugufeixue.Common; namespace WpfControl { /// <summary> /// PieChartControl.xaml 的交互逻辑 /// </summary> public partial class PieChartControl : UserControl { const int clickDelta = 200; DateTime mouseDownTime; bool rotate; Point startPosition; public PieChartControl(DataEntity de, bool isUseColor) { InitializeComponent(); LoadPieChart(de, isUseColor); } public void LoadPieChart(DataEntity de, bool isUseColor) { Series series= new PieSeries2D(); //设置饼状图Label样式 SeriesLabel label = new SeriesLabel(); label.Indent = 15; label.TextPattern = "{A}: {VP:P2}"; series.Label = label; foreach (KeyValuePair<string, double> kvp in de.Dic) { //这里和XYDiagram不一样，饼状图只能用SeriesPoint添加点来创建Series，没找到其他的好方法 SeriesPoint point = new SeriesPoint(kvp.Key, kvp.Value); if (isUseColor) { SolidColorBrush brush; if (kvp.Key.Contains("运行")) { brush = new SolidColorBrush(Color.FromRgb(0x00, 0xFF, 0x00)); } else if (kvp.Key.Contains("启动")) { brush = new SolidColorBrush(Color.FromRgb(0x00, 0xFF, 0x00)); } else if (kvp.Key.Contains("正常")) { brush = new SolidColorBrush(Color.FromRgb(0x00, 0xFF, 0x00)); } else if (kvp.Key.Contains("停止")) { brush = new SolidColorBrush(Color.FromRgb(0xFF, 0x00, 0x00)); } else if (kvp.Key.Contains("启炉")) { brush = new SolidColorBrush(Color.FromRgb(0x00, 0xFF, 0x00)); } else if (kvp.Key.Contains("停炉")) { brush = new SolidColorBrush(Color.FromRgb(0xFF, 0x00, 0x00)); } else if (kvp.Key.Contains("开")) { brush = new SolidColorBrush(Color.FromRgb(0x00, 0xFF, 0x00)); } else if (kvp.Key.Contains("关")) { brush = new SolidColorBrush(Color.FromRgb(0xFF, 0x00, 0x00)); } else if (kvp.Key.Contains("故障")) { brush = new SolidColorBrush(Color.FromRgb(0xFF, 0xFF, 0x00)); } else if (kvp.Key.Contains("需监管")) { brush = new SolidColorBrush(Color.FromRgb(0x00, 0x00, 0xFF)); } else if (kvp.Key.Contains("反馈")) { brush = new SolidColorBrush(Color.FromRgb(0x00, 0x00, 0xFF)); } else if (kvp.Key.Contains("高料位报警")) { brush = new SolidColorBrush(Color.FromRgb(0xFF, 0xC0, 0xCB)); } else if (kvp.Key.Contains("无状态")) { brush = new SolidColorBrush(Color.FromRgb(0xCC, 0xCC, 0xCC)); } else if (kvp.Key.Contains("无")) { brush = new SolidColorBrush(Color.FromRgb(0xCC, 0xCC, 0xCC)); } else { brush = new SolidColorBrush(Color.FromRgb(0xCC, 0xCC, 0xCC)); } //设置每一个扇形的不同颜色 point.Brush = brush; } series.Points.Add(point); } series.LabelsVisibility = true; PieSeries2D.SetLabelPosition(series.Label,PieLabelPosition.Outside); //设置Legend的格式 series.LegendTextPattern = "{A}: {VP:P2}"; diagram2D.Series.Add(series); title.Content = de.Ytitle; } //设置饼状图的动画效果 bool IsClick(DateTime mouseUpTime) { return (mouseUpTime - mouseDownTime).TotalMilliseconds < clickDelta; } double CalcAngle(Point p1, Point p2) { Point center = new Point(chart.Diagram.ActualWidth / 2, chart.ActualHeight / 2); Point relativeP1 = new Point(p1.X - center.X, p1.Y - center.Y); Point relativeP2 = new Point(p2.X - center.X, p2.Y - center.Y); double angleP1Radian = Math.Atan2(relativeP1.X, relativeP1.Y); double angleP2Radian = Math.Atan2(relativeP2.X, relativeP2.Y); double angle = (angleP2Radian - angleP1Radian) * 180 / (Math.PI * 2); if (angle > 90) angle = 180 - angle; else if (angle < -90) angle = 180 + angle; return angle; } void chart_MouseUp(object sender, MouseButtonEventArgs e) { ChartHitInfo hitInfo = chart.CalcHitInfo(e.GetPosition(chart)); rotate = false; if (hitInfo == null || hitInfo.SeriesPoint == null || !IsClick(DateTime.Now)) return; double distance = PieSeries.GetExplodedDistance(hitInfo.SeriesPoint); Storyboard storyBoard = new Storyboard(); DoubleAnimation animation = new DoubleAnimation(); animation.Duration = new Duration(new TimeSpan(0, 0, 0, 0, 300)); animation.To = distance > 0 ? 0 : 0.3; storyBoard.Children.Add(animation); Storyboard.SetTarget(animation, hitInfo.SeriesPoint); Storyboard.SetTargetProperty(animation, new PropertyPath(PieSeries.ExplodedDistanceProperty)); storyBoard.Begin(); } void chart_MouseDown(object sender, MouseButtonEventArgs e) { mouseDownTime = DateTime.Now; Point position = e.GetPosition(chart); ChartHitInfo hitInfo = chart.CalcHitInfo(position); if (hitInfo != null && hitInfo.SeriesPoint != null) { rotate = true; startPosition = position; } } void chart_MouseMove(object sender, MouseEventArgs e) { Point position = e.GetPosition(chart); ChartHitInfo hitInfo = chart.CalcHitInfo(position); if (hitInfo == null) return; if (rotate && !IsClick(DateTime.Now)) { PieSeries2D series = chart.Diagram.Series[0] as PieSeries2D; double angleDelta = CalcAngle(startPosition, position); startPosition = position; } } } }